UNITED STATES 



/ t 



EXPLORING EXPEDITION. 



DURING THE TEARS 



1838, 1839, 1840, 1841, 184'2. 



UNDER THE COMMAND OF 



CHARLES WILKES, U.S.N. 

 VOL. XI. 



METEOROLOGY, 



BY 



CHARLES W I L K E S, U, S. N., 



MEMBER OF THE AMERICAN PHILOSOPHICAL SOCIETY, KTC. 



WITH 



TWENTY-FIVE ILLUSTRATIONS. 



PHILADELPHIA: 

 PRINTED BY C. SHERMAN. 



1851. 



